Improved middlings-separator



, UNITED STATE .IosEPH BARKER, dor oHIoAcO, ILLINOIS, AssIeNoa 'ro HnvIsELr, A. L. BROWN, AND fr. n. BROWN, vOF sAME PLAGE.

IMPROVED MIDDLlnes-SEPARA-roa.

Specification forming partof Letters Patent No. 9*?,31119 dated November 30, 1869; antedated November 17, 1869.

To all 'whom it may concern:

Be -it known that I, JOSEPH BARKER, of Chicago, in the county of Cook and State of Illinois, have invented an Improved Middlings-Separator; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings and letters marked thereon, mak-` from middlingsl after they come from bolts or bran-dusters of iiouringemillsjand its nature consists in the novel means used to produce a suction-blast., in connection with a series of sieves of diii'erent meshes, constructed and arranged as follows:

A A represent a substantial frame, which has any convenient form suitable to support the working-parts of the separator. K is a fan-case, which is divided by a partition, L, Fig. 2, and in which fans M N are rotated by means of a belt passing over a pulley, 0, the shaft lt, supporting the fans and pulley, having bearings in the frame A, or in boxes placed above it, as most convenient. The object of the partition L is so to divide the current of air as lo give a stronger blast at the lower end of the sievecase than at its upper end. Three blast-pipes communicate with the interior of the fan-case, as shown at Figs. l and 2. The end pipesEE are fastened to the ends of the oase, and project down nearly to the sieves in the case B, and the center pipe G has branch pipes F F, which fasten to the pipes E E', and also communicate with the inside of the fan-case, a partition, d, Fig. 2, giving a separate blast to the pipe E. This is done in order that the finer and lighter particles, which do not pass through the first sieves 8, by being subjected toa light blast of the pipe E, may not all be taken up, but that the remainder will be operated upon by the blast of the pipe G, which is stronger, and

ythen pass under a pipe, E', which gives the strongest blast. The tine middlings pass through a hopper, Z, and onto a sieve, 9, Fig. 2, and consequently receive a lighter blast than the coarser middlings', which pass through a hopper, Y, and onto a sieve, 8. The blast is regulated by means of slides D and dampers4 H I J. Sieves 1, 2, 3, &c., are so arranged as to be adjusted in the case B, thereby grading the middlings separated from the bra-n, accordingly as circumstances may require. This case Bis pivoted at its lower end in the usual manner, and is made to oscillate by means of a spring-pitman, P, attached to a standard projecting up from the case, and by a Wrist projecting out from the pulley O. Fixed to and projecting outward from the case K is a curved discharge-pipe, T, which is enlarged at its outer end VU, and covered with wire-cloth, or some porous fabric, b, which will allow air to escape, and yet prevent bran or middlings from passing through. This pipe is enlarged, as stated, in order to diminish the force of the outward blast, for the purpose of bringing the substance passing through Onto an inclined sieve, W, Fig. 3, and thereby separate what finer particles there may be left in the bran, a backboard, X, preventing the finer particles from escaping, except through an opening at g, Fig. 3.

It will be seen from this description that the bran and lighter particles are taken up and carried through the spout T U, while the our and heavy particles pass through the sieves and fall below the case B.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

1. The combination of the case K, provided Witha partition, L, and fan M N, with the partition d, pipes E G E F F', and case B, provided with sieves 1, 2, 3, 4, 5, &c., as set forth.

2. The discharge-pipe T U V, provided with a perforated covering, b, back-board X, and sieve W, in combination with the case K and fan M N, as described.

JOSEPH BARKER.

Witnesses:

G. L. OHAPIN, E. E. GIBSON. 

